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NEET Exam  >  NEET Test  >  Biology Class 12  >  Assertion & Reason Test: Sexual Reproduction in Flowering Plants - NEET MCQ

Sexual Reproduction in Flowering Plants - Free Assertion & Reason Questions


MCQ Practice Test & Solutions: Assertion & Reason Test: Sexual Reproduction in Flowering Plants (10 Questions)

You can prepare effectively for NEET Biology Class 12 with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Assertion & Reason Test: Sexual Reproduction in Flowering Plants ". These 10 questions have been designed by the experts with the latest curriculum of NEET 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 10 minutes
  • - Number of Questions: 10

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Assertion & Reason Test: Sexual Reproduction in Flowering Plants - Question 1
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Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion: Pollen mother cells (PMCs) are the first male gametophytic cells.
Reason: Each PMC gives rise to two pollens.

Detailed Solution: Question 1

Primary sporogenous cell gives rise to microspore mother cells or pollen mother cells (PMCs). They are sporophytic in nature i.e., diploid. These cells undergo meiosis (reduction division) which gives rise to 4 microspores or pollens and this formation of microspores or pollens is called microsporogenesis. Microspores represent the beginning of the gametophytic phase and they are haploid in nature.
Topic in NCERT: Microsporogenesis
Line in NCERT:
"Each one is a potential pollen or microspore mother  cell. As each cell of the sporogenous tissue is capable of giving rise to a microspore tetrad. Each one is a potential pollen or microspore mother cell. The process of formation of microspores from a pollen mother cell (PMC) through meiosis is called microsporogenesis. The microspores, as they are formed, are arranged in a cluster of four cells–the microspore tetrad." 

Assertion & Reason Test: Sexual Reproduction in Flowering Plants - Question 2
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Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A): Fertilization in flowers, produces fruits and seeds.

Reason (R): After fertilization the ovary develops into fruits and ovule develops into seed.

Detailed Solution: Question 2

Fertilization occurs when one of the sperm cells fuses with the egg inside of an ovule. After fertilization occurs, each ovule develops into a seed. Each seed contains a tiny, undeveloped plant called an embryo. The ovary surrounding the ovules develops into a fruit that contains one or more seeds

Topic in NCERT: POST-FERTILISATION: STRUCTURES AND EVENTS

Line in NCERT: "As ovules mature into seeds, the ovary develops into a fruit, i.e., the transformation of ovules into seeds and ovary into fruit proceeds simultaneously."

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Assertion & Reason Test: Sexual Reproduction in Flowering Plants - Question 3
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Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion: Pollen grains from male parent are mostly transferred to the stigma in the female parent by some external agency.

Reason: This is because the male flowers or male organs have no internal device to reach the female organs in another flower.

Detailed Solution: Question 3

Internal copulatory organs are absent in plants and thus the aid of an external agency is required for the transfer of pollen grains from the anther to the stigma.

Topic in NCERT: Pollination

Line in NCERT: "Transfer of pollen grains (shed from the anther) to the stigma of a pistil is termed pollination. Flowering plants have evolved an amazing array of adaptations to achieve pollination. They make use of external agents to achieve pollination."

Assertion & Reason Test: Sexual Reproduction in Flowering Plants - Question 4
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Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A): Pollen grains are best preserved as fossils.

Reason (R):The outer layer of pollen grains called the exine is made up of sporopollenin.

Detailed Solution: Question 4

The correct option is A Both assertion and reason are true and reason is the correct explanation of assertion.
Pollen grains are well preserved as fossils because their outer wall exine is made up of a highly resistant organic material called sporopollenin.
Sporopollenin is able to withstand high temperatures and strong acids and alkali. It cannot be degraded by any enzyme known so far.
Therefore, both assertion and reason are true and reason is the correct explanation of assertion.

Topic in NCERT: Pollen Grains

Line in NCERT: "Pollen grains are well-preserved as fossils because of the presence of sporopollenin."

Assertion & Reason Test: Sexual Reproduction in Flowering Plants - Question 5
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Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion: Chasmogamous flowers require pollinating agents.

Reason: Cleistogamous flowers do not expose their sex organs.

Detailed Solution: Question 5

The majority of angiosperms bear chasmogamous flowers, which means the flowers expose their mature anthers and stigma to the pollinating agents. There is another group of plants which set seeds without exposing their sex organs. Such flowers are called cleistogamous and the phenomenon is cleistogamy.

Topic in NCERT: SEXUAL REPRODUCTION IN FLOWERING PLANTS

Line in NCERT: "Chasmogamous flowers require pollinating agents."

Assertion & Reason Test: Sexual Reproduction in Flowering Plants - Question 6
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Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion (A):  Cleistogamous flowers produce assured seed-set even in the absence of pollinators.
Reason (R): Cleistogamous flowers have exposed anthers and stigma.

Detailed Solution: Question 6

Cleistogamous flowers are bisexual flowers which do not open at all. Therefore they never expose the anthers and stigma.
Cleistogamous flowers produce assured seed-set even in the absence of pollinators. This is because the anther and stigma lie close to each other. When pollen is released, it comes in contact with the stigma resulting in pollination. Hence, pollinators are not required for pollination in cleistogamous flowers.
Topic in NCERT: Cleistogamous flowers
Line in NCERT: "Cleistogamous flowers produce assured seed-set even in the absence of pollinators."

Assertion & Reason Test: Sexual Reproduction in Flowering Plants - Question 7
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Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion: A typical microsporangium of angiosperms is generally surrounded by four wall layers.

Reason: The outer three wall layers perform the function of protection and help in dehiscence of anther to release the pollen.

Detailed Solution: Question 7

A typical microsporangium consists of two parts, outer wall and central homogeneous sporogenous tissue. Microsporangial wall has four types of layers– epidermis, endothecium, 1–3 middle layers and tapetum. The outer three wall layers perform the function of protection in the young anther and mechanism of dehiscence in the ripe anther.

Topic in NCERT: Structure of microsporangium

Line in NCERT: "A typical microsporangium appears near circular in outline. It is generally surrounded by four wall layers - the epidermis, endothecium, middle layers and the tapetum. The outer three wall layers perform the function of protection and help in dehiscence of anther to release the pollen."

Assertion & Reason Test: Sexual Reproduction in Flowering Plants - Question 8
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Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A): Perisperm is a haploid tissue.

Reason (R): Perisperm is the remains of nucellus which surround the embryo in certain seeds.

Detailed Solution: Question 8

Perisperm is a nutritive tissue of a seed derived from the nucellus and deposited externally to the embryo sac. It is diploid.

Topic in NCERT: Seed

Line in NCERT: "Occasionally, in some seeds such as black pepper and beet, remnants of nucellus are also persistent. This residual, persistent nucellus is the perisperm."

Assertion & Reason Test: Sexual Reproduction in Flowering Plants - Question 9
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Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion: Insects visit flower to gather nectar.
Reason: Attraction of flowers prevents the insects from damaging other parts of the plant.

Detailed Solution: Question 9

Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
Explanation: Insects do visit flowers to gather nectar, which is a source of food for them, so the assertion is true. The reason is also true, as the attraction of flowers can help prevent insects from damaging other parts of the plant. However, the reason is not the correct explanation of the assertion, as insects visit flowers primarily for the nectar, and the prevention of damage to other parts of the plant is a secondary benefit.
Topic in NCERT: Pollination
Line in NCERT: "To sustain animal visits, the flowers have to provide rewards to the animals. Nectar and pollen grains are the usual floral rewards."

Assertion & Reason Test: Sexual Reproduction in Flowering Plants - Question 10
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Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A): Tapetum is formed during the process of the formation of microsporangium.

Reason (R): The play an important role in guiding the pollen tubes into the synergid.

Detailed Solution: Question 10

Assertion is true, but the reason is wrong because tapetum plays an important role in nourishing pollen mother cells (PMCs) or microspores.

Topic in NCERT: Tapetum

Line in NCERT: "Cells of the tapetum possess dense cytoplasm and generally have more than one nucleus."

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About this NEET Practice Test

This test contains 10 MCQs on Assertion & Reason Test: Sexual Reproduction in Flowering Plants with detailed solutions for each question. It is part of the Biology Class 12 course on EduRev, designed to align with the current NEET syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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